wow64: Initialize the syscall dispatcher in the 32-bit TEB.

dlls/wow64/syscall.c

@@ -827,8 +827,10 @@ static DWORD WINAPI process_init( RTL_RUN_ONCE *once, void *param, void **contex
  */
 static void thread_init(void)
 {
+    TEB32 *teb32 = (TEB32 *)((char *)NtCurrentTeb() + NtCurrentTeb()->WowTebOffset);
     void *cpu_area_ctx;
 
+    teb32->WOW32Reserved = PtrToUlong( pBTCpuGetBopCode() );
     RtlWow64GetCurrentCpuArea( NULL, &cpu_area_ctx, NULL );
     NtCurrentTeb()->TlsSlots[WOW64_TLS_WOW64INFO] = wow64info;
     if (pBTCpuThreadInit) pBTCpuThreadInit();